Synthesis of W-Cu Composite Powder by Sintering Ammonium Paratungstate (APT) and Copper Nitrate

SEM image of W-Cu Composite Powder

Tungsten and Copper (W-Cu) composite powder has a wide applications in electronics, electromechanical, military, and aerospace and other industries. This is due to its excellent thermal and electrical conductivity. The properties of these powders are dependent on their composition, characteristics of the starting powders and its synthesis procedures.

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Gas-Solid Reaction of Ammonium Paratungstate(APT) to Produce Tungsten Carbide

 SEM micrograph of W-30 wt%

The main application of tungsten carbide (WC) is the production of hardmetal, or cemented carbide Cemented carbides are composite materials consisting of a hard phase (WC) and a metal, Hardmetal is used for cutting, drilling and wear resistant pieces. Tungsten carbide used for producing hardmetal is conventionally synthesized by heating a mixture of metallic tungsten powder and carbon black in a graphite furnace under a flowing hydrogen atmosphere. The carburization reaction is described as a solid state reaction between W and C. This reaction is re- markably dependent on the diffusion of C in W. There- fore the reaction temperature is high and lies in the range 1400–1800°C. This technique is able to produce WC powders with a wide range of mean particle sizes.

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Polymer Tungsten Curtain Applied for Mobile CT Scanner

polymer tungsten curtain applied for mobile CT scanner picture

Polymer tungsten curtain is a kind of protective curtain made of a new radiation protection material - a composite material of tungsten powder and high molecular polymer (one or more of plastic, rubber or thermoplastic elastomer). According to the experts, polymer tungsten curtain is an important radiation shielding in a mobile CT scanner.

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Tungsten Rubber Medical Glove

tungsten rubber medical glove picture

Tungsten rubber medical glove is high-density polymer tungsten glove having excellent radiation protection properties, which is fabricated using rubber as the matrix and tungsten powder as the filler. According to the experts, the radiation shielding capability of a substance is related to its atomic number and material density. The higher the atomic number and the greater the material density, the better the shielding performance.

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A Preparation Method of Polymer Tungsten

a preparation method of polymer tungsten picture

The experts proposed a preparation method of polymer tungsten. The prepared polymer tungsten has good physical and mechanical properties, good weather resistance, chemical resistance and organic solvent resistance so that it has a wide application such as radiation shielding, vibration isolation, counterweight, and ordnance, etc.

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